I used another glowforgers puzzle maker
https://cdn.rawgit.com/Draradech/35d36347312ca6d0887aa7d55f366e30/raw/b04cf9cd63a59571910cb226226ce2b3ed46af46/jigsaw.html
To make this puzzle for my grandson.
I cut the puzzle twice with one offset down and to the right to make it easy to put together.
I tried this with non-standard wood and it didnt work as well